The average age of a man and his son is 40 years. The ratio of their ages is 11 : 5 respectively. What is the… · ABC26GN1506
Subject: General Aptitude · Chapter: Average · Exam: Bank Recruitment 2009
The average age of a man and his son is 40 years. The ratio of their ages is 11 : 5 respectively. What is the son’s age?
Answer
No answer key was printed for this question.
Explanation
Let the ages of the man and his son be $11 x$ and $5 x$ years respectively. $$\text { Then, average age }=\left(\frac{11 x+5 x}{2}\right) \text { years }=8 x \text { years. } \quad \therefore 8 x=40 \Rightarrow x=5 .$$ Hence, son's age $=5 x=25$ years.
Explanation as extracted from the printed page; notation may be imperfect.